A type of graffiti or street art that employs colorful displays of knitted or crocheted cloth, rather than paint or chalk. While yarn installations--called yarn bombs or knit bombs--may last for years, they are considered non-permanent, and, unlike graffiti, can be easily removed if necessary. The practice is believed to have originated in the U.S. with Texas knitters trying to find a creative way to use their leftover and unfinished knitting projects, but it has since spread worldwide.

While other forms of graffiti may be expressive, decorative, territorial, socio-political commentary, advertising or vandalism, yarn bombing is almost exclusively about reclaiming and personalizing sterile or cold public places.

Kaiti: "What do you do with all the leftover yarn scraps from your knitting projects?"